今何時？
JavaScript
＿時 へ戻る
大学生のための数学 へ戻る
2026.03.31
今何時？
プログラムの内容：
<!DOCTYPE html> <html lang="ja"> <head> <meta charset="UFT-8"> <meta name="Viewpoint" content="width=device-width,initial-scale-1.0"> <style> section { margin-left: 14px; margin-right: 14px; } </style> </head> <body><br> <section> <button class="save_btn">今何時？</button> <ul> <div class="save_time"></div> </ul> <script> const saveBtn = document.querySelector('.save_btn'); const saveTime = document.querySelector('.save_time'); saveBtn.addEventListener('click', () => { const now = new Date(); const nowYear = now.getFullYear(); const nowMonth = now.getMonth()+1; const nowDate = now.getDate(); const nowHour = now.getHours(); const nowMinute = now.getMinutes(); saveTime.innerText = `${nowYear}/${nowMonth}/${nowDate} ${nowHour}:${nowMinute}`; }); </script> </sectoin> </body> </html>
JavaScript＿時 へ戻る 大学生のための数学 へ戻る